Example #1
0
        internal static void Decode(AsnReader reader, Asn1Tag expectedTag, out EncryptedContentInfoAsn decoded)
        {
            if (reader == null)
            {
                throw new ArgumentNullException(nameof(reader));
            }

            decoded = default;
            AsnReader sequenceReader = reader.ReadSequence(expectedTag);

            decoded.ContentType = sequenceReader.ReadObjectIdentifierAsString();
            System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(sequenceReader, out decoded.ContentEncryptionAlgorithm);

            if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0)))
            {
                if (sequenceReader.TryReadPrimitiveOctetStringBytes(new Asn1Tag(TagClass.ContextSpecific, 0), out ReadOnlyMemory <byte> tmpEncryptedContent))
                {
                    decoded.EncryptedContent = tmpEncryptedContent;
                }
                else
                {
                    decoded.EncryptedContent = sequenceReader.ReadOctetString(new Asn1Tag(TagClass.ContextSpecific, 0));
                }
            }


            sequenceReader.ThrowIfNotEmpty();
        }
Example #2
0
        internal static void Decode(AsnReader reader, out EncryptedContentInfoAsn decoded)
        {
            if (reader == null)
            {
                throw new ArgumentNullException(nameof(reader));
            }

            Decode(reader, Asn1Tag.Sequence, out decoded);
        }
        private static void DecodeCore(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out EncryptedContentInfoAsn decoded)
        {
            decoded = default;
            AsnValueReader      sequenceReader = reader.ReadSequence(expectedTag);
            ReadOnlySpan <byte> rebindSpan     = rebind.Span;
            int offset;
            ReadOnlySpan <byte> tmpSpan;

            decoded.ContentType = sequenceReader.ReadObjectIdentifier();
            System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.ContentEncryptionAlgorithm);

            if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0)))
            {
                if (sequenceReader.TryReadPrimitiveOctetString(out tmpSpan, new Asn1Tag(TagClass.ContextSpecific, 0)))
                {
                    decoded.EncryptedContent = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
                }
                else
                {
                    decoded.EncryptedContent = sequenceReader.ReadOctetString(new Asn1Tag(TagClass.ContextSpecific, 0));
                }
            }


            sequenceReader.ThrowIfNotEmpty();
        }
 internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out EncryptedContentInfoAsn decoded)
 {
     try
     {
         DecodeCore(ref reader, expectedTag, rebind, out decoded);
     }
     catch (AsnContentException e)
     {
         throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding, e);
     }
 }
 internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out EncryptedContentInfoAsn decoded)
 {
     Decode(ref reader, Asn1Tag.Sequence, rebind, out decoded);
 }